/Engine/Plugins/Media/PixelStreaming/Source/PixelStreamingInput/Public/PixelStreamingInputMessage.h
Constructor taking a Structure. Sets ID to next available ID and calculates bytelength from the structure.
FPixelStreamingInputMessage ( [TArray](API\Runtime\Core\Containers\TArray)< [EPixelStreamingMessageTypes](API\Plugins\PixelStreamingInput\EPixelStreamingMessageTypes) > InStructure )